[llvm] [AMDGPU] Add regbankselect rules for G_ADD/SUB and variants (PR #159860)

[Petar Avramovic via llvm-commits]

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@@ -74,6 +74,7 @@ class RegBankLegalizeHelper {
   MachineRegisterInfo::VRegAttrs SgprRB_S32 = {SgprRB, S32};
   MachineRegisterInfo::VRegAttrs VgprRB_S32 = {VgprRB, S32};
   MachineRegisterInfo::VRegAttrs VccRB_S1 = {VccRB, S1};
+  MachineRegisterInfo::VRegAttrs SgprRB_S16 = {SgprRB, S16};
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petar-avramovic wrote:

Think this is unused now

https://github.com/llvm/llvm-project/pull/159860